Anyone heading to northern Arizona Sunday evening should pack their skis — and their snow tires.

Nathan Lynum, a meteorologist with the National Weather Service, projects up to 13 inches of snow in Flagstaff, 11 inches in Payson and 10 inches in Prescott. Snow could fall in altitudes as low as 4,000 feet, with Camp Verde getting a few inches.

The heaviest snowfall is expected to begin Sunday evening and into Monday morning, Lynum said.

Lynum said a winter storm warning and advisory went into effect 11 a.m. Sunday where it will remain until 11 p.m. Monday.

"We do want people to be aware that there will be winter driving conditions throughout much of this evening and into most of tomorrow," Lynum said.

He recommended drivers slow down be extra careful where visibility is limited.

The most hazardous travel conditions will begin tonight for much of northern #azwx and last into Monday. Snow will taper off Monday afternoon and into the evening. Make sure to check for your winter safety gear if you have to travel during the next twenty four hours! pic.twitter.com/3vWv6tTOXH